Device for insertion of marking strips into a forming stack



July 29, 1969 Y J- SCHMIDT 3,458,186

DEVICE FOR INSERTION 0F MARKING STRIPS INTO A FORMING STACK Filed Sept.8, 1966 2 Sheets-Sheet 1 IG 2 I Q I9 l7 3 2 /2 22 1 7 96L 3 3' 2 33 .30540 "d I8 4 39 86 4 1"! -J T3 6 0 llb 2 F 1 Ha 0 4* ,,-\35 S I INVENTOR36 JOACHIM SCHMIDT 5 BY E ATTORNEY.

J- SCHMIDT July 29, 1969 DEVICE FOR INSERTION OF MARKING STRIPS INTO AFORMING STACK 2 Sheets-Sheet 2 Filed Sept. 8. 1966 INVENTOR JOACHIMSCHMIDT ATTORNEY.

United States Patent 3,458,186 DEVICE FOR INSERTION 0F MARKING STRIPSINTG A FORMING STACK Joachim Schmidt, Bohlitz-Ehrenberg, Germany,assignor t0 VEB Druckrnaschinenwerke Leipzig, Leipzig, Germany, acorporation of Germany Filed Sept. 8, 1966, Ser. No. 577,968 Int. Cl.B65h 39/00 US. Cl. 270-58 Claims ABS a CT OF THE DISCLOSURE A device forinsertion of marking strips into a forming stack which comprises a rigidtongue adjacent the The present invention relates to devices for theinsertion of marking strips in stacks of a printing machine, or thelike, in general, and to devices for the insertion of marking strips instacks of a printing machine which are formed rapidly by sheets whichare fed preferably in overlapping form, and which devices are controlledby pulse transmitters, in particular.

The marking strips in these devices are withdrawn from a supply roll andinserted directly over the sheet which is to be marked. It has provenadvantageous for the individual marking strips to be held by the deviceuntil a plurality of successive sheets has been deposited.

The use of marking strips inserted into a pile as it is formed is tomark specific counted numbers of sheets and to mark misprinted sheets ormackles.

It is known to provide counting or error monitoring devices at variousplaces of a printing machine to produce a signal or an electric pulse ata specified count or upon the detection of an error. For example, asheet-fed printing press may include a monitoring device on the frontgages of the printing press which generates a signal when a sheet doesnot lie in proper registry against the gages. The defective sheet iseither conveyed by a sheet switch to a separate mackles pile, oradvantageously as herein, marked by a defect marker which is inserted inthe pile adjacent the defective sheet. A number of devices are alreadyknown for these purposes.

For example, in the case of relatively slow machines, it is possible towithdraw marking strips from a roll by using ratchet wheels for theadvancing of the moving parts of the strip transport, and to place themon the pile and then cut them otf after a few sheets have been applied.The insertion of the marking tape into the pile, however, in this case,is not efiected in a set impulse-like manner, but inherently isrelatively slow, so that it could not be used for a printing machineproducing a rapid sequence of sheets. Moreover, it cannot be used forhighspeed printing machines since the marking strip would bend and bepushed down again by the following sheet. Additionally, in such devicesthe stepping forward of the sheet-counting is effected by mechanicalcontacts which are produced by each individual sheet as it is delivered(i.e., systematically by the stepping of ratchet wheels); accordingly,it cannot be used for control 'by pulse gen- "ice erating monitoringdevices which are desirable for use with rapid printing presses.

As another example, with roll-sheet machines when the sheets are cut offfrom the web by a cross-cutter, marking strips are inserted the lengthof the sheet, and are somewhat longer than the sheet in order to extendbeyond the edges of the sheets in the pile. In this connection it isnecessary for the marking strips to come from the direction of thecross-cutter. In such a device, the control can be eifected by pulses,but due to the fact that the strips must come from the direction of thecross-cutter, an excessive amount of space is required at this point ofthe machine which is already very constricted, and it is necessary todivert the web of paper. Furthermore, this device is arranged below thecross-cutter, resulting in poor accessibility, and great expense formachine parts.

Since the aforementioned device can be used only in connection withsheet delivery apparatus with felt-belt delivery means, furtherembodiments became known in which the marking strip is withdrawn fromthe supply roll and cut oti, and then folded into a V-shape at its frontend. Thereupon, the marking strip is pushed under the sheet web, or moreprecisely under the sheet which lies in front of the sheet to be markedso that the V-shaped fold opens up in the space between every two sheetsand the bent end snaps up into the plane of travel of the sheet. Amouthpiece for the insertion of this V-folded strip is controlled by amagnet by means of a tie rod. This device has the disadvantage ofrequiring a very large number of machine parts and cannot be used in thecase of sheets which are delivered in overlapping form since with thissystem of delivery there are no spaces between the individual sheets.

All of these devices have the disadvantage of not being able to be usedwith high-speed machines. It has been found that with sheet-cuttingspeeds, approximately, of more than cuts per minute the known devicesfor the insertion of marking strips failed. Accordingly, a markingdevice became known in which a spray gun applies color or pigment to thesheet web for marking. The color marking is efiected either on thetraveling web which is to be cut, or on the sheet after it has been out.However, this device cannot be used in connection with printing presses,since the paint or color, would interfere with the print. Furthermore,in order that the color marking can be recognized on the stacked pile,the edge of the sheet must be marked, and there is the danger that incase of three-sided trimming of the final stack of sheets, the markingwill be cut away.

For all of these reasons, there are still used sheet counting deviceswhich have a sensing member which slides over the cut edges of thecompleted deposited stack of sheets and converts the mechanicalmovements of the sensing member into electrical pulses for the actuatingof a counting mechanism and for the inserting of ream marks by knowndevices after the predetermined number of sheets has been reached. Thesedevices which, in themselves, are popular, however, have thedisadvantage that either the entire device must be brought to the stacksof sheets, or the individual stacks of sheets must be brought to thesheet-counting device. Furthermore, there is the disadvantage thatcounting can be'efiected only at a time when, for instance, the printingpress is being set up for a new order. In addition, these devices are ofno benefit when it is desired to insert defect markings into the pilesof sheets as the piles are formed.

Accordingly, it is one object of the present invention to eliminate thedefects and disadvantages of prior marking devices, and to provide anapparatus by which subsequent counting is avoided, and additionally,which even in the case of high speed machines, e.g., sheet-cuttingspeeds, of approximately more than 150 cuts per minute,

can be used directly on the specific sheet-fed machine, thus offeringconsiderable economic advantages.

It is another object of the present invention to provide a device forthe insertion of marking strips in stacks of a printing machine by whicheither defective sheets can be characterized by insertion of a markingstrip, for 1nstance a colored strip, or a specified number of countedsheets can be marked by the insertion of a marking strip, and whereinboth may be controlled by any suitable pulse generator.

It is still another object of the present invention to provide a devicefor the insertion of marking strips in stacks of a printing machine, fedin staggered form, or otherwise, wherein the marking strip cannot bepushed away and comes to rest, even in the case of extremely highdelivery speeds, accurately and dependably on t he sheet which is to bemarked, and further with the ab1lity of simultaneously introducing bothdefective and marking sheets.

It is yet another object of the present invention to provide a devicefor the insertion of marking strips in stacks of a printing machine, inaccordance with the above-mentioned objectives, wherein it is possibleto effect the insertion of the marking strip in very short intervals, atleast in intervals of 5 seconds.

It is still a further object of the present invention to provide adevice for the insertion of marking strips in stacks of a printingmachine, comprising a rigid tongue and having an upper surface and alower surface and a common junction at the front thereof, the latterextending substantially laterally to the sidewise feed direction of thearticles forming the stack a distance equal to a substantial portion ofthe dimensions of the articles adjacent the stack, a supply of markingmaterial disposed closely underneath the tongue, tongue and markingmaterial means for advancing the tongue angularly into the forming stackat the then top of the stack in a direction opposite to the feeddirection of the articles and such that the common junction at the frontof the tongue substantially abuts the top of the stack covering thelower surface from the articles coming from the feed direction so thatsubsequent stacking angularly occurs on the tongue, the articles slidingup the tongue and angularly stacking thereon and for subsequentlyadvancing the marking material underneath the advanced tongue above thethen top of the stack extending beyond the edges of the then top, andwithdrawing means for effecting withdrawal of the tongue from the stack,the subsequent stacking falling on the then top and the marking materialthereon, stabile and reliable angular stacking and marking is achieved.

It is yet an additional object of the present invention to provide adevice for the insertion of marking strips in stacks of a printingmachine, in accordance with the above-mentioned objective, wherein thesupply of marking material comprises a roll of marking materialincluding a free end, the free end disposed closely underneath the rigidtongue for being advanced onto the then top of the stack, holding meansfor maintaining the free end stationary on the then top when the tongueis withdrawn from the stack, and the device further comprising cuttingmeans for severing the free end from the roll of marking material afterthe tongue has been withdrawn from the stack by the withdrawing meansleaving the free end in the stack extending thereover.

It is yet still another object of the present invention to provide adevice for the insertion of marking strips in stacks of a printingmachine, comprising a tape-tension roll which in known manner iscombined with a magnet responsive to a pulse signal, and which drives acontinuous shaft. The shaft in its turn drives by means of two gearsfixed onto it, two devices, respectively, for moving a steel tonquedirectly, as well as for advancing the corresponding marking strip bythe interposition of a unilateral spring coupling. This takes place in amanner that the movement of the steel tongue leads the movement of themarking strip so that the marking strip can be inserted under the steeltongue, which tongue extends over the pile. A second magnet is alsoprovided for driving the cutting device. One-half of the above-mentionedspring coupling is firmly arranged on a shaft which is connected via apinion with the first-mentioned gear and the second half of the springcoupling is formed in the manner that three radial grooves which areapart are arranged, preferably,in an upper transport roller foradvancing the marking strip tape. Furthermore, a lower transport rollerwhich is rigidly connected with a gear is urged by the force of a springagainst the upper transport roller and a gear rigidly connected with thelatter. The circumferential profile of the two transport rollers hascomplementary ridge edges. The steel tongue consists of two steel bandseach of which is firmly connected t its rear end with one of two windingrolls, respectively, and are brought together at their front end fromthe rolls and there terminate sharply in the manner of a knife. Theposition of the insertion path of the marking strip forms an angle ofabout 10 with the position of the surface of the pile.

With this invention, in addition to the afore-indicated advantages, oneor more marking strip insertion devices can be arranged alongside ofeach other at the sheet delivery edge. Furthermore, the device of thepresent invention makes it possible to dependably effect the insertionof marking strips for different purposes even in the case of high-speedroll-feed rotary presses, or similar units, operating with a rapiddelivery of sheets. Due to the fact that several of these units arearranged alongside of each other, the signals of varied monitoringdevices of the individual units of the machines can easily be taken and,corresponding to their pulses, be evaluated and characterized by theinsertion of marking strips of different colors. It is readily possiblefor the printer even in the case of presses operating with the highestspeed to rapidly note those units of the machine which are operatingdefectively. If, for instance, five insertion devices are arranged atthe sheet-delivery edge of a fourcolor roll-feed offset machine, onethereof for the insertion of ream marks and four for the insertion ofdefect marks, then the register monitoring members of each printingmechanism can bring about the insertion of defect marks. In this way itis possible for the printer to correct the improper register on theprinting unit in question, deduct the number of defective sheetsdelivered from the delivery count and remove them from the pile.Furthermore, it can be dependably determined at what time the requiredamount of delivered sheets has been attained. Additionally, apparatus ofthe present invention has the advantage of being able to be easilyattached, subsequently, to practically all types of existing machines.

With these and other objects in view, which will become apparent in thefollowing detailed description, the present invention will be clearlyunderstood in connection with the accompanying drawings, in which:

FIG. 1 is a perspective view of the marking device in accordance withthe present invention;

FIG. 2 is a plan view of the marking device of FIG. 1;

FIG. 3 is a side view along the lines 3-3 of FIG. 2;

FIG. 4 is a side view along the lines 44 of FIG. 2;

FIG. 5 is a side view of a part of the pile of oncoming sheets, fed instaggered form, and of the inserted steel tongue, and the marking stripsinserted below the tongue prior to the cutting; and

FIG. 6 is a similar view to FIG. 4, but after the withdrawal of thesteel tongue and during the cutting.

Referring now to the drawings, and in particular to FIGS. 1 and 2, ashaft 2 and a shaft 3 are supported at their ends, respectively, in ahousing 1. To the shaft 2 there is rigidly connected a tape tensionroller 4 which is connected via a corresponding tape 4a with a pullingmagnet 5. The pulling magnet 5 responds to pulses given off by anautomatic (or manually operated) pulse generator 5a, which if automatic,detects a certain paper condition (e.g., a printing error or a certaincount) and which generates a pulse in response thereto, which passes vialine 5b to the pulling magnet 5, and which in turn places the tapetension roller 4, and thus the shaft 2, in motion in a forward(clockwise) direction, for a short time. To the shaft 2 there arerigidly connected two gears 6 and 7, by which the movement of the shaft2 is directly transmitted to a means for moving a steel tongue 8, and toa means for inserting a marking strip 9 above the paper in the stack 9ato be marked.

The shaft 2 turns the gear 6 which drives a pinion 10 and which in turnis connected by suitable connecting means 11a with another gear 12. Thetwo gears (pinion 10 and gear 12) idle on the shaft 3 being freelydisposed thereon. The gear 12 turns an upper winding roller 13 viaidentical connecting means 11b, to which roller 13 is fastened, one ofthe steel band-s 8a of the steel tongue 8. On a shaft 14 fastened to thehousing 1, there is arranged a gear 15 driven by the gear 12; andrigidly connected to the gear 15 via connecting means 110, is a lowerwinding roller 16 for the second steel band 8b of the steel tongue 8.

Upon actuation of the pulse generator 5a and consequent movement ofshaft 2 and gear 6 in the forward or clockwise direction, the gears 10and 12 are turned in the counterclockwise direction, while gear 15 isturned clockwise. Accordingly, the opposed upper and lower windingrollers 13 and 16 turn counterclockwise and clockwise, respectively,advancing the steel bands 8a and 8b and hence tongue 8 toward the stack9a of papers to be marked. For directional purposes, a guide arm 16a isdisposed slightly behind the steel tongue 8 fastened to the housing 1.

The tongue 8 is operatively substantially rigid for being inserted ontothe stack and to permit subsequent papers to fall angularly thereon,providing space therebelow for the marking strip to be inserted. Thetongue 8 has an upper surface 80 and a lower surface 8d and a commonjunction 8e at the front of the tongue. The common junction 8e extendssubstantially laterally to the feed direction of the sheets 31 (FIG. 2)a distance equal to a substantial portion of the dimensions of thearticle. The tongue 8 when moved onto the stack 9:: is advancedangularly to the top of the stack in a direction opposite to the feeddirection of the sheets 31 and such that the common junction 8esubstantially abuts the top of the stack, thereby covering the lowersurface 8d and preventing the subsequently fed papers from passingunderneath the tongue, so that subsequent stacking occurs above thetongue, the sheets sliding up the tongue and angularly stackingdependably thereon.

The shaft 2 also turns the gear 7 which drives a pinion 17, keyed ontothe shaft 3, which pinion 17 is rigidly connected via the shaft 3, witha coupling half 18, also keyed onto the shaft 3. Opposite the couplinghalf 18 is an upper transport roller 19, which idles on the shaft 3,which has on its coupling side three radial grooves 20 arranged 120apart. On the coupling half 18 there is arranged a flat coupling spring21, which upon each movement of the coupling half 18, engages in one ofthe grooves 20, thus turning the transport roller 19 along with thecoupling half 18. To the transport roller 19 there is fastened bysuitable rigid connecting means 11d, another gear 22 which idles on theshaft 3 as well as a pinion 22a fastened to a lower transport roller 23,via connecting means 112, and which thus drives the lower transportroller 23. Both the transport roller 23 and the pinion 22a turn on ashaft 25 arranged on a rocker 24. The rocker 24 is pivotally supportedapproximately at its center on a pin 26 fixed in the housing 1 so thatthe lower transport roller 23 is pressed against the upper transportroller 19 by a spring 27 connected on the side of the rocker 24 oppositethe shaft 25 to the housing 1.

On a support shaft 28 there is provided, below the housing 1, a supplyroll 29 from which the marking strip 9 is withdrawn by means of abipartite guide tube 30. In order to accurately grasp the marking strip9, straighten the strip and impart the necessary stiffness to it,complementary ridge edges 30a are arranged on the upper transport roller19 and on the lower transport roller 23.

Upon actuation of the pulse generator 5a consequent movement of shaft 2and gear 7 in the forward or clockwise direction, the pinion 17,coupling half 18 and spring 21 are turned in the counterclockwisedirection. The coupling spring 21, accordingly, engages the uppertransport roller 19 via one of the grooves 20, turning the uppertransport roller 19 in the counterclockwise direction. The gear 22 isturned counterclockwise riding over pawl spring 30b, turning lower gear22a and lower transport roller 23 clockwise. Accordingly, the opposedturning, abutting rollers 19 and 23 advance the marking strip 9 throughthe guide tube 30 toward the stack 9a of papers to be marked.

In operation, when a pulse to the pulling magnet 5 places the shaft 2and the entire apparatus in motion, as heretofore described, both thesteel tongue 8 and the marking strip 9 advance toward the stack ofpapers. However, the steel tongue 8 advances quicker than the markingstrip 9 since the pinion 10 associated with the means for moving thesteel tongue 8 is smaller than the pinion 17 associated with the meansfor moving the marking tape 19'. The steel tongue 8 leads the markingtape 9 upon actaution of the pulling magnet 5 so that the steel tongue 8first insures that the oncoming sheets 31 first push or fall over thetongue 8, and that the marking strip 9, disposed closely below thetongue 8, will in all cases definitely come to lie on the sheet to bemarked. For this purpose, the entire insertion device is preferablyinclined about 10 to the edge of the stack. Only after severalsuccessive sheets have been delivered above the steel tongue 8 is thetongue 8 withdrawn without disturbing the marking strip 9 (as willhereinafter be described). The tongue 8 is withdrawn to behind a cuttingdevice 32, as shown in FIG. 5, and the marking strip 9 is cut from themarking strip web 32a. The cutting device 32 is located adjacent thepile side of the housing 1 and comprises an upper cutter 33 and a lowercutter 34. A pulling magnet 35, actuates the cutting device 32, and iscontrolled either by a second pulse from the pulse generator 5a via line36 or else as a function of the pulling magnet 5 via a relay time-delay(not shown). The upper cutter 33 is movable and connected by a pivot pin37 with the lower cutter 34 and on the other side via a pull member 38with the pull magnet 35. An additional known safety device (not shown)provides assurance that the magnet 35 can only be released when thesteel tongue 8 is withdrawn to its position of rest.

In the case of high-speed rotary printing presses the sheets arrive onthe pile in rapid sequence. The cutting operation herein can be startedafter only a few seconds, and since at this time the rest of theapparatus is already in the starting position, a new insertion operationcan be started immediately after the cutting operation, i.e. theinsertion operation can be repeated in at least intervals of 5 seconds.

Referring now to the withdrawing and returning operation, a block 39 isfirmly fastened to the shaft 2. After the completion of the briefmovement of the unit, heretofore described, which inserted first thetongue 8 and then the marking strip 9 into the stack of papers, andwhich was actuated by the pulling magnet 5, the shaft 2 and the tongue 8are brought back into the starting position by a tension spring 40arranged between the block 39 and the housing 1. In this connection, theupper and lower transport rollers 19 and 23, respectively, are held fastin position by the pawl spring 30b having the shape of a locking pawlwhich engages into the teeth of the gear 22. The shaft 2 and gears 7 and17 and coupling half 18 now turn in the reverse direction (opposite tothe heretofore described forward direction) and the coupling spring 21disengages from the groove 20 in the upper transport roller 19 alongtapered groove edge 41 adapted for sliding disengagement when thecoupling half 18 turns clockwise and the upper transport roller remainslocked.

As will now be apparent, the rollers 19 and 23 can only move in thedirection to advance the marking tape 9; and during reversal of theunit, for repositioning of the tongue 8, the releasable coupling meanscomprising spring 21 on coupling half 18, disengages the gears 7 and 17from operatively connecting the rollers 19 (and 23) which otherwisewould move the tape 9 backwards. For purposes herein, operativelyconnecting one means with another is defined as that connection, whetherdirectly, or indirectly through other gears and shafts, by whichmovement of said one means causes movement of the other, or vice versa.

The gears 6 and 10 also turn in the reverse direction, as well as thegears 12 and 15, and consequently the winding rollers 13 and 16,respectively, for the tongue 8, withdraw the tongue 8 from the stack andcausing the papers above the tongue to fall on the uncut insertedmarking tape 9, as shown in FIGS. and 6, ready for the cutting.

As should now be apparent, the device described accordingly provides thecapability to actuate the tongue 8 and marking tape 9 from a commondriving means (shaft 2) and a common actuator (magnet 5), while havingthe ability to reverse the movement of tongue 8 for positioning for thenext operation (by reversing the movement of shaft 2), without reversingthe movement of the marking tape rollers 19 and 23, which otherwisewould remove the tape 9 from the stack.

While I have disclosed one embodiment of the present invention, it is tobe understood that this embodiment is given by example only and not in alimiting sense, the scope of the present invention being determined bythe objects and the claims.

I claim:

1. A device for insertion of marking strips into a stack forming by afeed of articles from a feed direction sidewise to the stack comprisingan operative substantially rigid tongue adjacent said forming stack andhaving an upper surface and a lower surface and a common junction ofsaid surfaces at the front of said tongue, said common junctionextending substantially laterally to the feed direction a distance equalto a substantial portion of the dimensions of said articles,

a supply of marking material disposed closely underneath said lowersurface of said tongue,

tongue and marking material means for advancing said tongue angularlyinto said forming stack at the top of said stack in a direction oppositeto the feed direction of said articles and such that said commonjunction at the front of said tongue substantially abuts said top ofsaid stack covering said lower surface from said articles in said feeddirection so that subsequent stacking angularly occurs on said tongue,said articles sliding up said tongue and angularly stacking thereon andfor subsequently advancing said marking material underneath saidadvanced tongue above said top of said stack extending beyond the edgesof said top, and

withdrawing means for effecting withdrawal of said tongue from saidstack, said subsequent stacking falling on said top and said markingmaterial thereon.

2. The device for insertion of marking strips into a forming stack, asset forth in claim 1, wherein said supply of marking material comprisesa roll of marking material including a free end, said free end disposedclosely underneath said rigid tongue for being advanced onto said top ofsaid stack,

holding means for maintaining said free end stationary on said top whensaid tongue is withdrawn from said stack, and

said device further comprising cutting means for severing said free endfrom said roll of marking material after said tongue has been withdrawnfrom said stack by said withdrawing means leaving said free end in saidstack extending thereover.

3. A device for insertion of marking strips into a forming stackcomprising an operative substantially rigid tongue adjacent said formingstack,

a supply of marking material disposed closely underneath said tongue,

tongue and marking material means for advancing said tongue angularlyinto said forming stack at the top of said stack so that subsequentstacking angularly occurs on said tongue and for subsequently advancingsaid marking material underneath said advanced tongue above said top ofsaid stack extending beyond the edges of said top,

withdrawing means for effecting withdrawal of said tongue from saidstack, said subsequent stacking falling on said top and said markingmaterial thereon,

said supply of marking material comprises a roll of marking materialincluding a free end, said free end disposed closely underneath saidrigid tongue for being advanced onto said top of said stack,

holding means for maintaining said free end stationary on said top whensaid tongue is withdrawn from said stack,

said device further comprising cutting means for severing said free endfrom said roll of marking material after said tongue has been withdrawnfrom said stack by said withdrawing means leaving said free end in saidstack extending thereover,

said tongue and marking material means comprises,

common driving means for moving in a forward direction and in a reversedirection,

actuating means for moving said common driving means in said forwarddirection for a predetermined period,

tongue moving means responsive to said common driving means foradvancing said tongue angularly into said forming stack at the top ofsaid stack so that subsequent stacking angularly occurs on said tongueand for withdrawing said tongue from said stack,

marketing moving means responsive to said common driving means forsubsequently advancing said marking material underneath said advancedtongue above said top of said stack extending beyond the edges of saidtop,

said marketing moving means comprises,

transport roller means for advancing and for engaging said free end andfor advancing said free end toward said stack when said transport rollermeans is advanced,

releasable coupling means for releasably operatively coupling saidcommon driving means to said transport roller means,

said releasable coupling means for operatively connecting said commondriving means to said transport roller means thereby advancing saidtransport roller means when said common driving means moves in theforward direction,

said releasable coupling means for disengaging said common driving meansfrom operative connection with said transport roller means when saidcommon driving means moves in reverse,

said tongue means comprising,

winding roller means engaging said tongue for advancing and withdrawingsaid tongue into and from said stack, respectively,

said winding roller means movable in a forward direction for moving saidtongue into said stack and movable in a reverse direction forwithdrawing said tongue from said stack,

first gear means rigidly connected to said common driving means andrigidly operatively connected to said winding roller means,

said first gear means for moving in a forward direction and in a reversedirection when said common driving means moves in a forward directionand a reverse direction, respectively,

said first gea-r means for moving said winding rolle means in theforward direction when said first gear means moves in said forwarddirection, and said first gear means for moving said winding rollermeans in reverse when said first gear means moves in reverse, and

said withdrawing means operatively connected to said common drivingmeans for moving said common driving means in reverse after saidpredetermmed period.

4. The device for insertion of marking strips into a forming stack, asset forth in claim 3, wherein said common driving means consists of afirst shaft connected to and driven by said actuating means,

said marking moving means further comprising a second gear means rigidlyconnected to and driven by said first shaft, said second gear means formoving in a forward direction and a reverse d rect on when said firstshaft moves in a forward dlrection and a reverse direction,respectively,

said releasable coupling means rigidly operatively connected to saidsecond gear means and releasably connected to said transport rollermeans, and

said first gear means sized relative said second gear means so that saidtongue leads said free end toward said stack when said first shaft ismoved in the forward direction.

5. The device for insertion of marking strips into a forming stack, asset forth in claim 4, wherein said actuating means is responsive toelectrical signals for turning said first shaft in the forward directionin response thereto for said predetermined period 6. The device forinsertion of marking strips lnto a forming stack, as set forth in claim5, wherein said withdrawing means comprises a lever block keyed to saidfirst shaft, and a tension spring means connected to said lever blockfor turning said first shaft in reverse after said predetermined period.

7. The device for insertion of marking strips into a forming stack, asset forth in claim 6, wherein said releasable coupling means comprises acoupling half rigidly operatively connected to and driven by said secondgear means, said coupling half for moving in a forward direction and areverse direction when said second gear means .moves in a forwarddirection and a reverse direction, respectively,

a spring coupling rigidly connected to said coupling half and for movingin a forward direction and a reverse direction when said coupling halfmoves in a forward direction and a reverse direction, respectively,

said transport roller means disposed adjacent said spring coupling andformed with radial grooves thereon adapted for receiving in rigidengagement therein said spring coupling when said coupling half andspring coupling move in said forward direction, and for advancing saidtransport roller means when said spring coupling is rigidly engaged insaid radial grooves,

said holding means for locking said transport roller when said couplinghalf and said spring coupling move in reverse, and

said spring coupling releasing from said radial grooves when saidcoupling half and spring coupling move in reverse. 8. The device forinsertion of marking strips into a forming stack, as set forth in claim7, wherein said transport roller means comprises an opposed directionalfirst transport roller and an opposed directional second transportroller, said first and second transport rollers coplanarly disposed,said first transport roller having said radial grooves therein, eachgroove oriented apart, and detachably connected to said spring couplingfor rigid engagement therein and for 'being advanced thereby when saidcoupling half and spring coupling move in the forward direction, thirdgear means rigidly connected to said first transport roller and to saidsecond transport roller for advancing said second transport roller in adirection counter to the direction of said first transport roller whensaid first transport roller is advanced, said first and second transportrollers each having a circumferential roll surface, said free end ofsaid marking material being disposed on and between said circumferentialroll surfaces of both said first and second transport rollers, means forurging said second transport roller roll surface toward said firsttransport roller roll surface thereby engaging said free end snuglybetween said surfaces, one of said circumferential roll surfacesincluding a ridge thereon and the other circumferential roll surfacehaving formed therein a complementary recess, and said holding meanscomprising a spring pawl means disposed adjacent said third gear meansfor permitting said third gear means to advance when said firsttransport roller is advanced and for preventing reverse movement of saidthird gear means when said coupling half and spring coupling move inreverse. 9. The device for insertion of marketing strips into a formingstack, as set forth in claim 8, wherein said second gear means comprisesa shaft gear keyed to said first shaft and a pinion connected to saidshaft gear, said device further comprises a second shaft keyed to saidpinion and keyed to said coupling half, said coupling half is elongatedbut generally conforming to the shape of one of said radial grooves andhaving a triangular cross-section and an inclined face, said couplingspring is substantially a fiat spring and is rigidly connected to saidinclined face of said coupling half, said first transport roller freelydisposed on said second shaft abutting said coupling spring, a thirdshaft holding said second transport roller thereon, and said means forurging said second transport roller roll surface toward said firsttransport roller roll surface comprising, a spring, and a rocker havingtwo ends pivoted between said ends, said rocker connected at on end tosaid third shaft and at the other end to said spring for pivotallyurging said third shaft towards said first transport roller. 10. Thedevice for insertion of marking strips into a forming stack, as setforth in claim 9, further comprising a bipartite guide tube disposedadjacent both said first and second transport rollers at the rollsurfaces thereof for directing said marking material from said roll ofmarking material between both said roll surfaces and from said rollsurfaces, and said bipartite guide tube consisting of one straightportion oriented parallel to said tongue and closely spaced underneathsaid tongue for directing said marking material from said roll surfaces.

11. The device for insertion of marking strips into a forming stack, asset forth in claim 10, wherein said actuating means comprises anelectromagnet tapetension roller responsive to electrical pulses fordriving said first shaft in the forward direction for said predeterminedperiod. 12. The device for insertion of marking strips into a formingstack, as set forth in claim 11, wherein said cutting means comprises anupper cutting blade and a lower cutting blade hingedly connectedtogether and disposed in spaced vertical relationship adjacent saidstack and between said free end of said marking material and saidtongue, and cutting actuating means for bringing said blades togetherafter said tongue has been withdrawn from said stack. 13. The device forinsertion of marking strips into a forming stack, as set forth in claim12, wherein said cutting actuating means comprises an electromagnetpulling member connected to said cutting means. 14. The device forinsertion of marking strips into a forming stack, according to claim 13,wherein said winding roller means comprises, two opposed winding rollersdisposed in spaced coplanar relationship, said tongue connected to eachof said winding rollers at its rear end away from said stack extendingtherefrom between said opposed winding rollers and brought together fromsaid winding rollers termimating in a knife-shaped tongue,

rigid connecting means including gears rigidly connected between saidwinding rollers for moving said rollers in counter relationship foradvancing and withdrawing said tongue, and 5 a rigid guide bar abuttingsaid moving tongue for positioning said tongue with respect to saidstack. 15. The device for insertion of marking strips into a formingstack, according to claim 14, wherein said first gear means comprises afirst gear keyed to said first shaft and a first pinion connected tosaid first gear, said first pinion disposed freely on said second shaft,pinion connecting means rigidly connecting said first pinion to one ofsaid opposed winding rollers, and said first gear is larger than saidshaft gear, so that said tongue leads said marking medium toward saidstack.

References Cited UNITED STATES PATENTS 9/1956 Rutkus et a1 270-39 9/1965Meyer-Jagenberg 9393.1 XR

US. Cl. X.R. 30 8323;9393

